Effects of the interaction between localized surface plasmons and rare-earth ion based solid-state gain media
DIPC Seminars
- Speaker
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Luisa Bausa (Dept. Fisica de Materiales and Instituto de Ciencia de Materiales Nicolas Cabrera, UAM)
- When
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2014/05/13
14:00 - Place
- Donostia International Physics Center (DIPC).Paseo Manuel de Lardizabal, 4 , Donostia
- Add to calendar
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**EFFECTS OF THE INTERACTION BETWEEN LOCALIZED SURFACE PLASMONS AND RARE-EARTH
ION BASED SOLID-STATE GAIN MEDIA**
** **
E. Yraola, P. Molina, M. O Ramírez and _L.E. Bausá *_
_Dept._ _Física de Materiales and Instituto de Ciencia de Materiales
NicolUniversidad Autónoma de Madrid, 28049-Madrid, Spain_
** **
The manipulation of light-matter interaction phenomena at the nanoscale by
means of plasmonic nanostructures gives rise to a variety of unique effects
that are currently the subject of an intense research activity from both
fundamental and technological point of view. These effects relay in the
ability of plasmonic nanostructures to strongly concentrate the
electromagnetic field in the vicinity of their physical boundaries, enhancing
the interactions between optical species (atoms, QDs, organic fluorophores,
etc) and far-field light [1,2].
Here, periodic arrays of Ag nanoparticles are photochemically assembled in
chain-like form on the ferroelectric domain walls of Nd3+ doped periodically
poled LiNbO3 laser crystals [3]. The coupling between the optical transitions
of Nd3+ ions and the localized surface plasmon resonances supported by the
metallic nanostructures results in a directional and periodic intensification
of the Nd3+ emission. The mechanism of enhancement is analyzed taking into
account the different polarization configurations [4].
On the other hand, the implications of the plasmonic coupling on the laser
parameters of the solid-state gain medium are evaluated to show a dramatic
reduction of the pump power at the laser threshold. The results constitute a
promising approach for gain-enhanced nanoplasmonic metamaterials, as well as
for rare earth based nanolasers operating at the subwavelength scale.
** **
[1] W. L. Barnes, A. Dereux and T. W. Ebbesen, _Nature 424 (_ 2003) **** 824.
[2] L. Novotny, N. van Hulst, _Nature Photonics 5,_ (2011) 83.
[3] E. Yraola, P. Molina, J. L. Plaza, M. O Ramírez and L. E. Bausá,
_Advanced Materials_ _25_ (2013) 910.
[4] P. Molina, E.Yraola, M. O Ramírez, J. Plaza, C. de las Heras, L. E.
Bausá, _Nano Letters 13_ (2013) 4931.